An image heating apparatus for heating a recording material, on which a toner image is carried, while conveying the recording material in a nip includes: a fixing roller including a metal core, a heat insulating layer formed on a surface of the core metal, and a high heat transfer layer which is formed on an outer peripheral surface of the heat insulating layer and has a higher thermal conductivity than the heat insulating layer; a heating member for heating the fixing roller from an outside; and a back-up member for forming the nip together with the fixing roller. When the fixing roller and the back-up member opposing the fixing roller are supplied with the same heat quantity, the temperature rise rate in a neighborhood of the surface of the back-up member supplied with the heat quantity is higher than that of the fixing roller.